Kaidou 【海道】4 The Japanese surnames etymology dictionary.
Shizuoka-ken , Aomori-ken , Hokkaidou . Terrain . From one river. In Shizuoka-ken Shimada-shi tell him that he lived in Katagawa , the same place during the Edo period. Location unknown. Hyougo-ken Akou-shi Kamakuya was in the Edo period in the Ako samurai of the clan office. Tokushima-ken Kaifu-gun Kaiyou-chou Distributed in Asakawa Katayama.